Kalmar “Cartesian” galibi tana nufin wani abu ne da ke da alaƙa da ra’ayoyi ko dabaru na masanin falsafa kuma masanicin lissafi René Descartes, wanda ake ɗauka a matsayin ɗaya daga cikin muhimman mutane a ci gaban falsafar Yammacin Turai da lissafi na zamani. p> Gabaɗaya, ana amfani da kalmar "Cartesian" don bayyana abubuwan da aka siffanta su da girmamawa ga tsabta, hankali, da tunani mai tsari, kuma ra'ayoyin Descartes sun rinjayi su game da mahimmancin shakku, dalili, da kuma hankali. hanyoyin nazari.Misali, a fannin lissafi da lissafi, “Cartesian coordinates” na nufin tsarin daidaitawa da ke amfani da ƙididdiga masu ƙima don bayyana wurin da maki a cikin jirgin sama ko a sararin samaniya, bisa ra’ayin Descartes. na amfani da ma'aunin algebra don wakiltar siffofi na geometric. Hakazalika, a cikin falsafa, "Shakkun Kartes" yana nufin hanyar Descartes na yin shakkar duk wani abu da ya yi imani da shi na gaskiya ne, don isa ga tushen ilimin da ba za a yi shakka ba.